Infrared Tracking System for Immersive Virtual Environments
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Date
2021
Journal Title
Journal ISSN
Volume Title
Publisher
The Eurographics Association
Abstract
In this paper, we describe the theoretical foundations and engineering approach of an infrared-optical tracking system specially design for large scale immersive virtual environments (VE) or augmented reality (AR) settings. The system described is capable of tracking independent retro-reflective markers arranged in a 3D structure (artefact) in real time (25Hz), recovering all possible 6 Degrees of Freedom (DOF). These artefacts can be adjusted to the user's stereo glasses to track his/her pose while immersed in the VE or AR, or can be used as a 3D input device. The hardware configuration consists in 4 shutter-synchronized cameras attached with band-pass infrared filters and the artefacts are illuminated by infrared array-emitters. The system was specially designed to fit a room with sizes of 5.7m x 2.7m x 3.4 m, which match the dimensions of the CAVE-Hollowspace of Lousal where the system will be deployed. Pilot lab results have shown a latency of 40ms in tracking the pose of two artefacts with 4 infrared markers, achieving a frame-rate of 24.80 fps and showing a mean accuracy of 0.93mm/0.52º and a mean precision of 0.08mm/0.04º, respectively, in overall translation/rotation DOFs, fulfilling the system requirements initially defined.
Description
@inproceedings{10.2312:pt.20091211,
booktitle = {ACTAS DO 17º ENCONTRO PORTUGUÊS DE COMPUTAÇÃO GRÁFICA},
editor = {Coelho, António and Cláudio, Ana Paula},
title = {{Infrared Tracking System for Immersive Virtual Environments}},
author = {Gaspar, Filipe and Dias, Miguel Sales and Bastos, Rafael},
year = {2021},
publisher = {The Eurographics Association},
ISBN = {978-3-03868-154-0},
DOI = {10.2312/pt.20091211}
}